* {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        
        html,
        body {
            width: 100%;
            height: 100%;
            overflow: hidden;
        }
        
        .container {
            /* width: 600px; */
            height: 600px;
            /* border: 1px solid red; */
            padding: 20px 15px
        }
        
        .nav {
            width: 100%;
            overflow: hidden;
            margin-bottom: 20px;
        }
        
        .nav li {
            width: 120px;
            height: 30px;
            line-height: 30px;
            border: 1px solid #ccc;
            float: left;
            font-size: 14px;
            text-align: center;
            font-weight: 600;
        }
        
        .sou span {
            padding: 10px;
        }
        
        .show ul li {
            float: left;
            border: 1px solid #666;
            text-align: center;
        }